Effects of growth retarding compounds on chlorophyll accumulation and nitrate reductase activity in nitrate induced cucumber cotyledons
Cotyledons were excised from 5-day old etiolated cucumber seedlings and .grown for 24 or 48 h in solutions of plant growth retardants: AMO-1618,B-Nine, CCC and phosfon D, supplemented with KNO3 (10-2M) in light. Nitrate reductase (NR) activity was determined in vivo. CCC and Phosfon D at high concen...
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| Published in: | Acta Societatis Botanicorum Poloniae Vol. 42; no. 3; pp. 431- - 439 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
Warsaw
Polish Botanical Society
01-01-2015
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Cotyledons were excised from 5-day old etiolated cucumber seedlings and .grown for 24 or 48 h in solutions of plant growth retardants: AMO-1618,B-Nine, CCC and phosfon D, supplemented with KNO3 (10-2M) in light. Nitrate reductase (NR) activity was determined in vivo. CCC and Phosfon D at high concentrations had no effect on nitrate reductase activity in 24 h tests. CCC at 5xl0-2 M enhanced NR activity in longer 48 h tests; Phosfon D was inhibitory in that case. AMO-1618 markedly decreased NR activity. B-Nine strikingly enhanced NR activity in KNO3 induced cytoledons; the effect was positively correlated with the concentration of B-Nine. Ali the compounds inhibited chlorophyll synthesis. |
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| ISSN: | 0001-6977 2083-9480 |
| DOI: | 10.5586/asbp.1973.033 |